Blockchain and Distributed Ledger Technologies (DLT) represent a paradigm for maintaining a decentralized and synchronized digital record across a network of computers. At its core, a DLT is a replicated, shared database where participants collectively maintain and validate the ledger without a central authority, relying on consensus algorithms to agree on the state of the record. Blockchain is the most well-known type of DLT, structuring data into a chronological chain of cryptographically linked blocks, which creates an immutable and tamper-evident history of transactions. This architecture provides a robust and fault-tolerant foundation for applications requiring trust, transparency, and security in a distributed environment, such as cryptocurrencies, supply chain management, and digital identity systems.